Hi
I’ve used Slickr flickr in the past with no problem. I’ve just uploaded the plug again recently and set it up to run a trial slideshow using this code
[slickr-flickr tag="trial" items="12" type="slideshow" captions="off" delay="3"]

Just recently this plugin has started to cause the following error message to appear on the mobile version of my website ‘Fatal error: This version of Galleria requires classic theme version 1.5 or later’, so I have had to disable the plugin.